磁性斯格明子的旋性布朗运动研究  

Research on the topology-dependent Brownian gyromotion of a single magnetic skyrmion

作　　者：赵乐 江万军 ZHAO Le;JIANG Wan-jun(Department of Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学物理系,北京100084

出　　处：《物理实验》2021年第3期1-7,共7页Physics Experimentation

摘　　要：从布朗运动的发现历史出发,介绍了布朗运动的运动特点与研究方法.结合具体的材料体系,详述了如何使用磁光克尔效应显微镜观察并采集单个磁性斯格明子的随机热运动行为.通过分析,最终发现磁性斯格明子随温度非线性增强的扩散行为,和与拓扑特性相关的旋进现象,以期为实验教学与科学研究提供思路与指导.The motion characteristics and research methods of Brownian movement were introduced.Based on the magnetic multilayer with a perpendicular magnetic anisotropy,the random thermal motion of a single skyrmion was observed and collected by the polar magneto-optical Kerr effect(MOKE)microscope.The movement exhibited a diffusion characteristic that nonlinear enhanced with temperature and a gyromotion phenomenon that related to topological properties.This studies could provide useful information for conducting laboratory-based research and teaching in the future.

关 键 词：磁性斯格明子 布朗运动 随机热扩散 磁光克尔效应 自旋电子学 

分 类 号：O552.1[理学—热学与物质分子运动论]